0 - 1 of 1 tags for concurrent load

Hi,
 
For a PPI table (with a NUPI), is it possible to load data concurrently to the same table via multiple sessions by the same user ? In other words, in a PPI table does TD lock only a particular partition for loading or the entire table is locked ?
For e.g. we have the following table :
Create table test_concur
(